This is a continuation of "[PATCH v2 0/3] i386: Add support for Hyper-V Enlightened MSR-Bitmap and XMM fast hypercall input features": https://lore.kernel.org/qemu-devel/20220217142949.297454-1-vkuzn...@redhat.com/ work which wasn't merged for 7.0, thus 'v3'.
This series enables four new KVM Hyper-V enlightenmtes: 'XMM fast hypercall input feature' is supported by KVM since v5.14, it allows for faster Hyper-V hypercall processing. 'Enlightened MSR-Bitmap' is a new nested specific enlightenment speeds up L2 vmexits by avoiding unnecessary updates to L2 MSR-Bitmap. KVM support for the feature on Intel CPUs is in v5.17 and in 5.18 for AMD CPUs. 'Extended GVA ranges for TLB flush hypercalls' indicates that extended GVA ranges are allowed to be passed to Hyper-V TLB flush hypercalls. 'Direct TLB flush hypercall' features allows L0 (KVM) to directly handle L2's TLB flush hypercalls without the need to exit to L1 (Hyper-V). The last two features are not merged in KVM yet: https://lore.kernel.org/kvm/20220414132013.1588929-1-vkuzn...@redhat.com/ however, there's no direct dependency on the kernel part as thanks to KVM_GET_SUPPORTED_HV_CPUID no new capabilities are introduced. Vitaly Kuznetsov (5): i386: Use hv_build_cpuid_leaf() for HV_CPUID_NESTED_FEATURES i386: Hyper-V Enlightened MSR bitmap feature i386: Hyper-V XMM fast hypercall input feature i386: Hyper-V Support extended GVA ranges for TLB flush hypercalls i386: Hyper-V Direct TLB flush hypercall docs/hyperv.txt | 34 ++++++++++++++++++++++ target/i386/cpu.c | 8 +++++ target/i386/cpu.h | 5 +++- target/i386/kvm/hyperv-proto.h | 9 +++++- target/i386/kvm/kvm.c | 53 +++++++++++++++++++++++++++++----- 5 files changed, 99 insertions(+), 10 deletions(-) -- 2.35.1
